<template>
    <div class="water-eval-container">
        <div class="pie3D" id="pei15"></div>
    </div>
</template>

<script>
import "echarts-gl";

export default {
    name: "cityGreenLand",
    props: ['childMessage'],
    components: {},
    data() {
        return {
            optionData: [],
            colors: [
                "#066AE9",
                "#6BD39F",
                "#FECD5E",
                "#FF8400",
                "#F052AF",
                "#18FF00",
                "#000CFE",
                "#0ED4FC",
                "#F3F286",
                "#9D33E3",
                "#FF00F0",
                "#FA014E",
                "#C8D823",
                "#5258D5",
            ],
        };
    },
    watch: {},
    mounted() {
        this.$nextTick(() => {
            this.handlerData();
        });
    },
    methods: {
        handlerData() {
            const color = ["#e47e56","#8addd7","#d3ae78","#87afd0","#a189d3"];
            const optionsData = [];
            this.childMessage.forEach((item, index) => {
                if (item.valule > 0) {
                    optionsData.push({
                        name: item.name,
                        value: item.valule,
                        itemStyle: {
                            color: color[index],
                            // opacity: 1,
                        },
                    })
                }
            });
            this.init(optionsData);
        },
        init(data) {
            //构建3d饼状图
            let myChart = this.$echarts.init(
                document.getElementById("pei15")
            );
            const series = this.getPie3D(data, 0.8, 240, 28, 26, 0.5);
            series.push({
                name: "pie2d",
                type: "pie",
                label: {
                    // show: false, // 隐藏默认标签
                    formatter: function (params) {
                        // 自定义标签内容
                        return '{percent|' + params.percent + '%}\n{value|' + params.value + '}';
                    },
                    opacity: 1,
                    fontSize: 13,
                    lineHeight: 20,
                    width: 70,
                    rich: {
                        percent: {
                            fontSize: 14,
                            fontWeight: 600,
                            align: 'center',
                            color: '#7196ff',
                        },
                        value: {
                            align: 'center',
                            color: '#fff',
                        }
                    }
                },
                labelLine: {
                    length: 30,
                    length2: 50,
                    lineStyle: {
                        // color: '#41B3DC',
                        type: "solid",
                        color: "#7BC0CB",
                    },
                },
                startAngle: 0, //起始角度，支持范围[0, 360]。
                clockwise: false, //饼图的扇区是否是顺时针排布。上述这两项配置主要是为了对齐3d的样式
                radius: ["20%", "58%"],
                center: ["50%", "50%"],
                data: data,
                itemStyle: {
                    opacity: 0,
                },
            });
            // 传入数据生成 option
            let option = {
                // legend: {
                //     tooltip: {
                //         show: true,
                //     },
                //     data: ["aa", "cc"],
                //     bottom: "10%",
                //     textStyle: {
                //         color: "#fff",
                //         fontSize: 12,
                //     },
                // },
                legend: {
                    bottom: -5,
                    orient: 'horizontal',
                    textStyle: {
                        color: "#c7e3f9",
                    },
                    icon: 'circle',
                },
                tooltip: {
                    formatter: (params) => {
                        if (
                            params.seriesName !== "mouseoutSeries" &&
                            params.seriesName !== "pie2d"
                        ) {
                            let bfb = (
                                (option.series[params.seriesIndex].pieData
                                        .endRatio -
                                    option.series[params.seriesIndex]
                                        .pieData.startRatio) *
                                100
                            ).toFixed(2);
                            return (
                                `${params.seriesName}<br/>` +
                                `<span style="display:inline-block;margin-right:5px;border-radius:10px;width:10px;height:10px;background-color:${params.color};"></span>` +
                                `${bfb}%`
                            );
                        }
                    },
                },
                // title: {
                //     text: "3D 饼图",
                //
                //     x: "center",
                //
                //     top: "20",
                //
                //     textStyle: {
                //         color: "#fff",
                //
                //         fontSize: 22,
                //     },
                // },
                // backgroundColor: "#333",
                xAxis3D: {
                    min: -1,
                    max: 1,
                },
                yAxis3D: {
                    min: -1,
                    max: 1,
                },
                zAxis3D: {
                    min: -1,
                    max: 1,
                },
                grid3D: {
                    show: false,
                    boxHeight: 15, // 三维笛卡尔坐标系在三维场景中的高度
                    viewControl: {
                        alpha: 40,
                        beta: 40,
                        distance: 500, //调整视角到主体的距离，类似调整zoom
                        rotateSensitivity: 0, // 设置为0无法旋转
                        zoomSensitivity: 0, // 设置为0无法缩放
                        panSensitivity: 0, // 设置为0无法平移
                        autoRotate: false, // 自动旋转
                    },
                },
                series: series,
            };
            myChart.setOption(option);
            // this.bindListen(myChart);
        },
        /**
         * 绘制3d图
         * @param pieData 总数据
         * @param internalDiameterRatio:透明的空心占比
         * @param distance 视角到主体的距离
         * @param alpha 旋转角度
         * @param pieHeight 立体的高度
         * @param opacity 饼或者环的透明度
         */
        getPie3D(
            pieData,
            internalDiameterRatio,
            distance,
            alpha,
            pieHeight,
            opacity = 1
        ) {
            const series = [];
            let sumValue = 0;
            let startValue = 0;
            let endValue = 0;
            const legendData = [];
            const k =
                typeof internalDiameterRatio !== "undefined"
                    ? (1 - internalDiameterRatio) /
                    (1 + internalDiameterRatio)
                    : 1 / 3;
            // 为每一个饼图数据，生成一个 series-surface 配置
            for (let i = 0; i < pieData.length; i += 1) {
                sumValue += pieData[i].value;
                const seriesItem = {
                    name:
                        typeof pieData[i].name === "undefined"
                            ? `series${i}`
                            : pieData[i].name,
                    type: "surface",
                    parametric: true,
                    wireframe: {
                        show: false,
                    },
                    pieData: pieData[i],
                    pieStatus: {
                        selected: false,
                        hovered: false,
                        k: k,
                    },
                };
                if (typeof pieData[i].itemStyle !== "undefined") {
                    const itemStyle = {};
                    if (typeof pieData[i].itemStyle.color !== "undefined") {
                        itemStyle.color = pieData[i].itemStyle.color;
                    }
                    if (
                        typeof pieData[i].itemStyle.opacity !== "undefined"
                    ) {
                        itemStyle.opacity = pieData[i].itemStyle.opacity;
                    }
                    seriesItem.itemStyle = itemStyle;
                }
                series.push(seriesItem);
            }
            // 使用上一次遍历时，计算出的数据和 sumValue，调用 getParametricEquation 函数，
            // 向每个 series-surface 传入不同的参数方程 series-surface.parametricEquation，也就是实现每一个扇形。
            for (let i = 0; i < series.length; i += 1) {
                endValue = startValue + series[i].pieData.value;
                series[i].pieData.startRatio = startValue / sumValue;
                series[i].pieData.endRatio = endValue / sumValue;
                series[i].parametricEquation = this.getParametricEquation(
                    series[i].pieData.startRatio,
                    series[i].pieData.endRatio,
                    false,
                    false,
                    k,
                    10
                );
                startValue = endValue;
                legendData.push(series[i].name);
            }
            return series;
        },
        // 生成扇形的曲面参数方程，用于 series-surface.parametricEquation
        getParametricEquation(
            startRatio,
            endRatio,
            isSelected,
            isHovered,
            k,
            h
        ) {
            // 计算
            const midRatio = (startRatio + endRatio) / 2;
            const startRadian = startRatio * Math.PI * 2;
            const endRadian = endRatio * Math.PI * 2;
            const midRadian = midRatio * Math.PI * 2;
            // 如果只有一个扇形，则不实现选中效果。
            if (startRatio === 0 && endRatio === 1) {
                isSelected = false;
            }
            isSelected = true;
            // 通过扇形内径/外径的值，换算出辅助参数 k（默认值 1/3）
            k = 1;
            // 计算选中效果分别在 x 轴、y 轴方向上的位移（未选中，则位移均为 0）
            const offsetX = isSelected ? Math.cos(midRadian) * 0.1 : 0;
            const offsetY = isSelected ? Math.sin(midRadian) * 0.1 : 0;
            // 计算高亮效果的放大比例（未高亮，则比例为 1）
            const hoverRate = isHovered ? 1.05 : 1;
            // 返回曲面参数方程
            return {
                u: {
                    min: -Math.PI,
                    max: Math.PI * 3,
                    step: Math.PI / 32,
                },
                v: {
                    min: 0,
                    max: Math.PI * 2,
                    step: Math.PI / 20,
                },
                x: function (u, v) {
                    if (u < startRadian) {
                        return (
                            offsetX +
                            Math.cos(startRadian) *
                            (1 + Math.cos(v) * k) *
                            hoverRate
                        );
                    }
                    if (u > endRadian) {
                        return (
                            offsetX +
                            Math.cos(endRadian) *
                            (1 + Math.cos(v) * k) *
                            hoverRate
                        );
                    }
                    return (
                        offsetX +
                        Math.cos(u) * (1 + Math.cos(v) * k) * hoverRate
                    );
                },
                y: function (u, v) {
                    if (u < startRadian) {
                        return (
                            offsetY +
                            Math.sin(startRadian) *
                            (1 + Math.cos(v) * k) *
                            hoverRate
                        );
                    }
                    if (u > endRadian) {
                        return (
                            offsetY +
                            Math.sin(endRadian) *
                            (1 + Math.cos(v) * k) *
                            hoverRate
                        );
                    }
                    return (
                        offsetY +
                        Math.sin(u) * (1 + Math.cos(v) * k) * hoverRate
                    );
                },
                z: function (u, v) {
                    if (u < -Math.PI * 0.5) {
                        return Math.sin(u);
                    }
                    if (u > Math.PI * 2.5) {
                        return Math.sin(u) * h * 0.1;
                    }
                    return Math.sin(v) > 0 ? 1 * h * 0.1 : -1;
                },
            };
        },


    },
};
</script>

<style lang="scss" scoped>
.water-eval-container {
  transform: translateY(-29px);
  width: 100%;
  height: 100%;
}

.pie3D {
  width: 90%;
  height: 85%;
  transform: translate(20px, 20px);
}
</style>
